Question: what is an aircraft functional class that starts with the letter t.
Paraphrase: What is a functional aircraft class starting with letter t.
SPARQL (Wikidata): SELECT DISTINCT ?sbj ?sbj_label WHERE { ?sbj wdt:P31 wd:Q20027953 . ?sbj rdfs:label ?sbj_label . FILTER(STRSTARTS(lcase(?sbj_label), 't')) . FILTER (lang(?sbj_label) = 'en') } LIMIT 25 
Answer: touring aircraft, touring aircraft, trainer/attack aircraft, trainer/attack aircraft, torpedo bomber, torpedo bomber, tanker aircraft, tanker aircraft, target tug, target tug, transport aircraft, transport aircraft, twinjet bomber, twinjet bomber, twin-turboprop airliner, twin-turboprop airliner